NSO Level 1- Science Olympiad (SOF) Class 8: Questions 470 - 474 of 1076

Access detailed explanations (illustrated with images and videos) to 1076 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 450.00 or

How to register?

Question number: 470

» Metals and Non-Metals

Edit
MCQ▾

Question

Copper is used to make electric wires. Which property of metals is used here?

Choices

Choice (4)Response

a.

Conductivity

b.

Ductility

c.

Malleability

d.

Both a. and b. are correct

Question number: 471

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

The uses of some materials are given in the statement. Identify them

The source of plastic is

Choices

Choice (4)Response

a.

Wood pulp

b.

Rubber

c.

Plant gum

d.

Petroleum

Question number: 472

» Metals and Non-Metals

Edit
MCQ▾

Question

The chemical reaction taking place in rust formation is

Choices

Choice (4)Response

a.

b.

c.

d.

Fe +

Question number: 473

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Bakelite is used to make switch boards. The property helping this is

Choices

Choice (4)Response

a.

It can resist heat and can tolerate higher temperature than plastic.

b.

It gets deformed easily.

c.

It is a poor conductor of electricity

d.

It can be bend easily

Question number: 474

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

A blend of polyster/cotton

Choices

Choice (4)Response

a.

Cotton wringles but the blended fabric does not wringle.

b.

Cotton is not much durable but the blended fabric is more durable.

c.

Polyster is not comfortable to wear but the blended fabric is more comfortable to wear.

d.

All a. , b. and c. are correct

Developed by: